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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Sperm production






2. (LH) stimulates the Leydig cells to produce testosterone






3. Larger the cow - more milk is produced; smaller the cow - less milk is produced






4. Days which have increasing daylight hours

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5. To remove/separate testicles from animal's body before animal reaches puberty






6. (LH) causes female's egg to break (her period)






7. ~305 days (altough often longer due to breeding difficulties)






8. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






9. When are dairy cattle dehorned?






10. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






11. 1. brain function - 2. blood flow - 3. willing female






12. Animals which have many estrous periods per year (ex: cow - sow)






13. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






14. Implies the amount of estrogen production






15. (FSH) causes egg to mature in females






16. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






17. Implies the amount of estrogen production






18. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






19. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






20. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






21. 4-6 days






22. 19-23 (21) days






23. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






24. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






25. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






26. (FSH) causes egg to mature in females






27. Sperm is produced here






28. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






29. 16-20 hours






30. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






31. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






32. Sperm is produced here






33. What about the sperm for a bull which has been castrated but still has testicles?






34. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






35. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






36. What helps regulate spermatogenesis?






37. Prevent the cow from getting an infection from the calve






38. (male) pushes the testes outward toward the legs for a cool-down off of the body






39. 45-60 days after breeding; re-breed as required






40. Days which have decreasing daylight hours

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41. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






42. 1-2 days






43. When are steers and heifers weaned from bottle feeding?






44. (switzerland) 2nd in size and milk production - most muscle -






45. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






46. 14-19 (17) days






47. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






48. Parturition is controlled by...






49. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






50. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market